Wire-tightening implement



M.. STElNBAC-H.

WIRE TlGHTENlNG |MPLEMENT.

APPLICATION HLED APR. 30. 1919.

Patented $ept. 14, 1920;

INVENTOR ATTORNEY UNITED sT A'rEs PATENT OFFICE.

MAX STEINBACH, on NEW YORK, N. Y.

WIRE-TIGHT ENING IMPLEMENT.

Application filed April 30,

T 0 all whom it may comm a:

Be it knownthat I, Max Srnrnnaou, a citizen of the United States, and a resident of New York, in the county of Bronx and State of New York, have invented certain new and useful Improvements in Vire- Tightening Implementaof which the following is a specification.

The present invention relates to improvements in wire-tightening implements, and is mainly adapted for use in applying tying wires to boxes, etc. I i

The main object of the invention is to provide a device of this character which is simple in construction, eflicient in operation, and which can be manufactured on a commercial scale, or, in other words, one which is not so diiiicult to produce as to be beyond the reasonable cost of such a contrivance.

With these and other objects in View, which will more fully appear as the nature of the invention is better understood, the same consists in the combination, arrangement and construction of parts hereinafter described, pointed out in the appended claim and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proportion. of the several parts and details of construction within the scope of the appended claim without departing from'the spirit or sacrificing any of the advantages of the invention.

One of the many possible embodiments of the invention is illustrated in the accompanying drawings, in which Figure 1 is a top plan view of an implement constructed in accordance with the present invention; Fig, 2 is a side elevation thereof, partly in section; and Fig. 3 is a section taken on line 33 of Fig. p

In the drawings, the numeral 10 indicates a frame or bar, that is provided upon one of its ends with an enlargement 11, having a recess 12 of a shape adapted to receive a corner of the box or other object arounl which the wire is to be tied. It is obvious that this recess may have also other shapes, depending upon the configuration of the receptacle, etc, that is to be tied. On the other end of the frame is disposed an upwardly extending bearing 13, in which is rotatably mounted a screw-threaded spindle 14 having left-hand threads, said spindle extending forward toward the enlargement 11 in parallel relation to the longitudinal Specificaiionof Letters Patent. Patented Sept'14, 1320,

1919. Serial No. 293,760.

axis of the frame 10. The threads of the spindle mesh with those in the bore 15 of a block 16. This block is adjustably mounted upon the frame 10 and may be held in any desired position thereon by a clamping bolt 17. To the free end of the spindle is rigidly attached a head 18, having twofixed wire clamping jaws 1.9, with each of which cooperates a movable clamping jaw20, the latter being pivoted at 21 to said head. Each aw 20 is'provided with a cam-shaped face 22, that is adapted to co-act with the respective fixed clamping jaw. 'Both' the fixed and movable jaws have teeth-like projections 23, so as to have a better grip on the wire. The stationary aws converge toward the longitudinal center line of the head 18, that is to say they are arranged at oblique angles to the longitudinal axis of the spindle 14- and provided, in front of the respective movable jaws, with guides 24:, through which the wire ends, denoted by the numeral 25, extend. The cam-shaped face of each movable jaw is so designed that the distance between its pivot 21 and the points on the cam-shaped face increase gradually from its edge marked X to its edge marked Y, so that a pull on the wire, in a direction opposite to the arrow shown in Fig. 1 of the drawings, causes the movable jaws to increase their grip on the wire ends, they being shifted by such pull around their pivots in the direction of the arrow shown upon the same inFig. 1 of the drawings. Each movable aw is provided with an up wardly extending his; 26, to facilitate the handling thereof.

To the block 16 is fixed a handle 27 for holdin'g'the implement, and upon the spin dle 14 is mounted a crank 28 for rotating the sam The operation of this device is as follows :The wire is placed around the box and given one or two twists near its meeting ends. The block 16 on. the instrument is shifted on the frame 10, so that the implement can be conveniently held by the operator in relation to the box, against which the frame abuts in twistingand tightening the wire. The two wire ends are then led between the guides 24% and placed against the two stationary jaws 19, the. movable jaws being manually shifted around their pivots into contact with the wire. Rotating then the crank 28 in the proper direction,

caused to move in the direction of the long arrow shown in Fig. 1 of the drawings, the head rotating with the spindle, thereby twisting the wire and tightening the same around the box.

From the foregoing it appears that the implement is very simple in construction and efficient in operation, its block 16 and spindle l iconstituting a self-locking de vice that prevents the jaws thereon from moving in the direction of the pull exerted thereon by the wire. Its jaws on the other hand, are so constructed and arranged with respect to each other that the wire itself draws them into gripping position without the aid of special devices, such as springs, etc.

hat I claim is A wire-tightener and twister, comprising a frame having a recess adapted to receive a portion of the object against which the implement bears in the tightening and twisting operation, a bearing member on said frame, a screw-threaded block adjustably fixed to said frame in alinement with said bearing member, a screw-threadedspindle shiftably and rotatably mounted in said bearing member having its threads in engagement with the threads of said block, a head upon said spindle including two stationary gripping jaws, the acting faces of said jaws being arranged at oblique angles to the longitudinal axis of said spindle, pivoted gripping jaws upon said head hav ing cam-shaped faces cooperating with said stationary jaws, said cam-shaped faces being so arranged in relation to their pivots that their grip is increased by the pull on the wire, and guides in front of said jaws through which the wire ends extend.

Signed at New York, in the county of New York, and State of New York, this 25th day of April, A. D., 19l9.

MAX STEINBACH. 

